etherpad-lite

Virtual whiteboard for sketching hand-drawn like diagrams

The communications platform that puts data protection first.

whiteboard SDK / infinite canvas SDK

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

Focalboard is an open source, self-hosted alternative to Trello, Notion, and Asana.

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

JavaScript Data Grid / Data Table with a Spreadsheet Look & Feel. Works with React, Angular, and Vue. Supported by the Handsontable team ?

Shared data types for building collaborative software

Grounded SAM: Marrying Grounding DINO with Segment Anything & Stable Diffusion & Recognize Anything - Automatically Detect , Segment and Generate Anything

Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion.